VIP double experience

Hi there,

Anyone experiencing (or not) a problem with the earned experience as a VIP member? I've just put another 2x exp ticket up and realised that I'm not getting the experience I should be getting? In the void encampment with a ticket up I should be getting in excess of 600 exp per mob - yet I'm only getting 401? Any ideas?

Or am I simply a silly goose and there is no 2x exp for VIP anymore? Or maybe someone ate my 2 x exp coupon?

Whatever the system is, it doesn't explain why I acquired the same amount of experience using a 3X experience token as I did when I had two 2X experience tokens. By definition I should be getting an additive 4x if it's a percentage/multiplier. Is there a clearer explanation of the boosts?